Tenon-cutter.



Patented Aug. 10, 1915.

2 SHEETSSHEET l.

S. N. HOUSE.

TENON CUTTER.

APPLICATION FILED SEPT.24| I914. I

Patented Aug. 10, 1915.

Ob 2 69M ED STATES PATENT OFFICE.

SAMUEL N. HOUSE, OF S'LLOUIS, MISSOURI.

TENON-CUTTER.

all whom it may concern:

Be it known that I, SAMUEL N. House, a

citizen of the United States of America, and a resident of the city of St. Louis and State of Missouri, have invented certain new and useful Improvements in Tenon-Cutters, of

which the following is a full, clear, and exact description, reference being had .to the accompanying drawings, forming a part of this specification.

My invention relates to a tenon cutter for forming tenons at the ends of wheel spokes or other articles, one of the objects being ti) produce a very strong tool'of thiskind which is well adapted to resist the severe j twisting stresses to which it is subjected in service. 1

With this object in view, the tenon cutter preferably comprises a skeleton main frame having parallel guide members adjacent to its sides, a slidable abutment'jaw and a slidable knife carrying jaw, both of which extend across the main frame. To secure the desired strength the guide members at the sides of the skeleton main frame are securely connected to each other by one or both of the slidable jaws which extend across the main framefi Prior to this invention tenon cutters have been provided with a main frame having guide members adjacent to its tion. Fig. II is an inverted plan view of the tenon cutter. Fig. III is a vertical section. Fig. IV is a transverse section taken approximately on'the line IV-IV, Fig. I.

The principal elements of the tenon cutter I have shown are the skeleton main frame A, a knife carrying jaw B, an abutmentjaw C, both of said jaws being slidably fitted to the main frame, and a screw D for moving said jaws toward and away from each other;

The main frame A preferably comprises a pair of legs land 2 separated from each other to receive the. tenonat the end of a spoke or other article, and integrally connected-together at their upper ends.

Specification of Letters Patent. Patented Aug. 10, 1915. Application filed September 24, 1914. Serial No. 863,274.

4 designates a non-circular stem secured -to the upper end of the main frame and adapted to fitinto a, rotatable socket 5 which may be operated in any suitable manner.

The legs 1 and 2 are provided with arched portions 6 which connect said legs near their lower ends, as shown most clearly in Fig. IV. The legs l and 2 are integrally connected to side bars 7 which form part of the skeleton main frame, and which are united by a substantially -U-shaped yoke 8 formed integral with said bars. Each side bar 7 is provided with a pair of cars 9 for the 'receptionof a rigid guide rod 10, the ends of said guide rod being firmly secured to said ears 9. The guide rods 10, located adjacent. to the opposite sides of the main frame, are

parallel with each other and it may be stated that these guide rods form part of the main frame.

The abutment jaw C comprises an abutment member 12 extending transversely of g a V-shaped the. main frame, and havin pocket for the reception of the tenon which is formed by cutting away a portion of a wheel spoke or other article. Tubular slide members 13, at the ends of the abutment member 12, surround'the guide rods 10 and are closely fitted thereto so that the guide rods are connected by the abutment nu-inher 12. The abutment jaw (3 is also provided with a yoke 14 which extends toward the yoke 8 ofthe main frame, as shown most clearly in Fig. II. v

The knife carrying jaw con-prises a. knife holding member 15 extending across the main frame and provided with tubular slide members 16, which surround the guide rods 10. These tubular slide members 16, like the mil-responding parts of the abutment jaw 12, are closely fitted to the guide rods.

15' designates a ydke preferably formed integral with the knife carrying jaw B, said yoke being located back of the abutment member 12.

17 designates a knife blade secured to the knife'carrying jaw B, in a manner hereinafter described.

. The adjusting screw 1). has a reduced neck 18 so journaled in the main frame as to prevent movement of said adjusting screw longitudinally of the main frame. Theadjust- I ing screw has a right hand screw thread 19 operable in the yoke of the knife carrying jaw, and a left hand thread operable in the yoke'of the abutment jaw. of the jaws being slidably fitted to the guide rods 10, rotation of the adjusting screw D results in moving said jaws toward and away from each other.

21 is a set screw carried by the abutment jaw C and adapted to engage the guide rods 10 to prevent movement of the jaws on the guide rods after they have been adjusted to the desired positions. 7

In cutting the tenon the article to be 0perated upon is cut by the knife 17 and the tenon after being formed by the knife passes between thejaws B and C and enters between the legs 1 and :2 of the main frame A to engage an adjustable stop 22 arranged between the legs 1 and E2, the stop being secured to the leg 1 by means of a screw Q3 passing through a slot in said le iVhen the tenon cutter is in service the skeleton main frame is rotated and the abutment and knife carrying jaw, which must turn with the skeleton main frame, are firmly engaged with the whrk. lherefore, the skeleton main frame is subjected to severe twisting strains, and, as previously pointed out, one of the objects of my invention is to provide a tenon cutter which is Well adapted to resist such strains. If the slidable jaws were merely interposed between the guide members at the sides of said skeleton mainframe, instead of being actually connected to said guide members, the twisting strains referred to would tend to spread the sides of the main frame away from each' other. In accordance with my invention the guide rods 10, forming part of the main frame, are actually connected to each other by one or both of the slidable are; positively prevented from moving away jaws. The side portions of the main frame horizontally, or in other Words the plane of the cutting edge should be at a right angle to the axis of the tenon, and since the knife blade must be removed and sharpened from time to time it has heretofore been quite difficult to locate the cutting edge in the desired plane. The knife I have shown is fitted to the knife holder 15 and secured thereto by means of a bolt 25 passing through the middle portion of the .knife and passing through a slot 26 in the knife holder 15.

The head of the bolt 25 is seated on a block 27 and a nut 28 screwed onto the threaded end of the bolt is adapted to bear against the knife holder 15. The means foradjusting the knife blade to locate its cutting edge in ing screws 29 screwed into the knife hoi Both I der formed at said cutting edge.

the desired plane comprises a pair of ad" at points adjacent to the opposite side edgew of the knife blade (Fig. ll), and engagiin the inner face of said knife blade. The knife blade may be tilted by turning eitlwr of the screws 29 and after the desired adjustment has been obtained the knife blad may be firmly clamped onto the inner ends of said-adjustment screws by turning the nut on the connecting bolt 25, which passes through the middle portion of the knife blade. To afford a more complete undeu standing of the merits of the peculiar meansfor adjusting the knife blade of my teuou cutter it should be stated that said blade is inclined slightly, in the usual manner, so that its cutting edgejwill engage the work to form a shoulder thereon, while the broad outer face of the blade will clear the shoulis intended to be used in cutting tenons of different dimensions on spokes of dif ferent dimensions, and in practice the cutting edge of the blade near the point 17 (Fig. ll) is in service in all cutting operations, while the remaining portion of the cutting edge is not in service in all cutting operations. Therefore, in practice the blade is rapidly worn away near its point 17 by frequent cutting and sharpening while th remaining portion of the blade is not sub jected to a like degree of wear by the cutting and sharpening operations. Owing tc inclination of the blade it must be tilted its holder when the cutting edge is Worn. away near the point 17', and the screws may be readily adjusted to locate the cutt-in edge in the desired plane.

I claim:

'1, A tenon cutter comprising a main frame provided with side members, guide rods the ends of which are rigidly fixed to said side members, an end member in the form of a yoke integrally connected to said sidemembers and forming part of said main. frame, an abutment jaw comprising an abutment member extending across the main frame and surrounding said guide rods, a substantially U-shaped yoke formed integral with said abutment member; a knife carrying jaw comprising a knife holder extending across said main frame and surrounding said guide rods, a substantially U-shaped yoke formed integral with said knife carrying jaw, and an adjusting screw journaled in the end member of said main frame and screwed into the yokes of said jaws.

2. A tenon cutter comprising a main frame provided with a stem at one of its ends and a pair of guide rods at its opposite end, said guide rods being arranged at right angles to the axis of the 'tenon cutter, a knife carrying jaw and an abutment jaw extending across said main-frame and sl1d- The tool each of said guide rods ably fitted to said guide rods, sald siidable jaws being arranged on'opposite sides of the axis of the tenon cutter and adapted to firmly engage opposite sides of the Work, being surrounded by and closely fitted to both of said jaws, so that the latter serve as means for connecting s idguide rods at .polnts on opposite sides aws.

Witnesses:

A. J. MGCAULEY, E. CLARK.

. S. N. HOUSE.

said axis, and means for adjusting said 

